Vehicle lamps

Abstract

PROBLEM TO BE SOLVED: To obtain uniform light emission even if the constitution of a light guide body is formed so as to be changed in a fore-and-aft length within a horizontal plane, and a light emission region at a front face is set shorter than a light incident region at a rear face within a vertical plane, in a vehicle lighting appliance having the light guide body.SOLUTION: A first light incident part 20A1 of a rear face 20b in a light guide body 20 is divided into a plurality of divided regions 20A1s within a horizontal plane, and a cross section of each divided region 20A1s along a vertical face parallel to an axial line Ax of the region is set to a curved shape whose curvature is large as that in the divided region 20A1s which is located in a portion in which a fore-and-aft length of the light guide body 20 is short. Then, light incident from the first light incident part 20A1 is made to directly reach a front face 20a in each position in a horizontal direction at the rear face 20b of the light guide body 20. By this constitution, when observing the light guide body 20 from a front part of the lighting appliance, ways of the lighting of the appliance are made substantially similar in the respective positions in the horizontal direction.

Description

technical field [0001] The present invention relates to a vehicle lamp provided with a light guide. Background technique [0002] Conventionally, as a vehicle lamp provided with a light guide, for example, as described in Patent Document 1, the emitted light from the light source is configured to enter from the rear of the light guide and emit from the front thereof. Such vehicle lamps are popular among people. well known. [0003] In the vehicular lamp described in Patent Document 1, the light guide body is configured as a light guide plate extending in the vehicle width direction, and its front and rear lengths vary depending on the position in the vehicle width direction. [0004] [Patent Document 1] Japanese Patent Laid-Open No. 2013-26008 [0005] Such vehicle lamps are often configured so that a light source is incident on the light guide from the rear, and light from the light source is emitted from the front of the light guide to the front of the lamp after repeate...

AI Technical Summary

Problems solved by technology

[0011] Therefore, when the light guide is viewed from the front of the lamp, the light varies depending on the position in the vehicle width direction, and there is a problem that uniform light cannot be emitted.

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